Luke 1:15

Next to his becoming the rejoicing of many, the greatness of his virtue is prophesied; as it is said, For he shall be great in the sight of the Lord. The greatness signified is not of the body, but of the soul. Greatness in the sight of the Lord is greatness of soul, greatness of virtue. He extended not the boundaries of an empire, nor brought back in triumph the spoils of war, (but, what is far greater,) preaching in the desert he overcame by his great virtue the delights of the world, and the lusts of the flesh. Hence it follows; And he shall drink no wine nor strong drink. On whomsoever the Holy Spirit is poured, in him there is fulness of great virtue; as in St. John, who before he was born, when yet in his mother's womb, bore witness to the grace of the Spirit which he had received, when leaping in the womb of his parent he hailed the glad tidings of the coming of the Lord. There is one spirit of this life, another of grace. The former has its beginning at birth, its end at death; the latter is not tied down to times and seasons, is not quenched by death, is not shut out of the womb.

Here, not the size of the body, but the greatness of the soul is declared. The magnitude of the soul is in the presence of the Lord, the magnitude of virtue: there is also the smallness of the soul, and the youthfulness of virtue. Therefore, John will be great not in the virtue of the body, but in the greatness of the soul. Ultimately, he did not propagate the boundaries of any empire, nor did he prefer any triumphs of war; but what is more, preaching in the desert, he suppressed the delights of men and the indulgence of the body with great virtue of the soul. Therefore, small in the world, great in spirit. Ultimately, like a great person, he did not change his steadfastness of conviction in the desire to live, captivated by the allurements of life. There is no doubt that this promise was true, for the holy John, while still in his mother's womb, recognized and received the grace of the Holy Spirit. For when neither his father nor his mother had yet done anything remarkable, he leaped in his mother's womb and announced the coming of the Lord to his mother. Thus you have what happened when the mother of the Lord came to Elizabeth, as she said: "Behold, as soon as the sound of your greeting came to my ears, the baby in my womb leaped for joy." For he did not yet have the spirit of life, but the spirit of grace. Indeed, in other instances we were able to anticipate the grace of sanctification preceding the living substance, as the Lord says: "Before I formed you in the womb I knew you, and before you were born I consecrated you; I appointed you a prophet to the nations." For another is the spirit of this life, another the spirit of grace.

[Daniel 8:16-17] "And I heard the voice of a man in the midst of the Ulai, and he cried out and said: 'Gabriel, make this vision intelligible (Vulgate: make this man to understand the vision).' And he came and stood near to where I was standing." The Jews claim that this man who directed Gabriel to explain the vision to Daniel was Michael. Quite appropriately it was Gabriel, who has been put in charge of battles, to whom this duty was assigned, inasmuch as the vision had to do with battles and contests between kings and even between kingdoms themselves. For Gabriel is translated into our language as "the strength of, or the mighty one of, God." And so at that time also when the Lord was about to be born and to declare war against the demons and to triumph over the world, Gabriel came to Zacharias (Luke 1:11-20) and to Mary (Luke 1:26-27). And then we read in the Psalms concerning the Lord in His triumph: "Who is this king of glory? The Lord strong and mighty, the Lord mighty in battle; He is the King of glory" (Psalm 24:8). But whenever it is medicine or healing that is needed, it is Raphael who is sent, for his name is rendered as "the healing of," or "the medicine of God" - that is, if one cares to accept the authority of the Book of Tobias (Tobit 12:11-15). […]

And now by certain of us the baptism of heretics is asserted to occupy the (like) ground, and, as if by a certain dislike of re-baptizing, it is counted unlawful to baptize after God's enemies. And this, although we find that they were baptized whom John had baptized: John, esteemed the greatest among the prophets; John, filled with divine grace even in his mother's womb; who was sustained with the spirit and power of Elias; who was not an adversary of the Lord, but His precursor and announcer; who not only foretold our Lord in words, but even showed Him to the eyes; who baptized Christ Himself by whom others are baptized.

And then, speaking of John, he thus says: "For he shall be great in the sight of the Lord, and many of the children of Israel shall he turn to the Lord their God. And he shall go before Him in the spirit and power of Elias, to make ready a people prepared for the Lord." For whom, then, did he prepare the people, and in the sight of what Lord was he made great?